High severity · published Mar 7, 2026
CVE-2026-3661
Wavlink WL-NU516U1 adm.cgi ota_new_upgrade command injection
7.2
CVSS
18.1%
EPSS
No
On KEV
Description
A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)18.1% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WL
WL-NU516U1 · Wavlink
240425 · source: vendor
WF
Wl-nu516u1 Firmware · Wavlink
m16u1_v240425 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3661
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3661
Exploit
https://github.com/jinhao118/cve/blob/main/WAVLINK_1.md
Permissions Required
https://vuldb.com/?ctiid.349550
Third Party Advisory
https://vuldb.com/?id.349550
Third Party Advisory
https://vuldb.com/?submit.758227
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